Vehicle-tire.



W. J.. COURTNEY.

VEHICLE TIRE. APP-LIbATION rum) NOV. 2a, 1908.

Patented Fb.15;1910.

Elvwem l'oz Witnesses M n m a 'nnrrnn stars-s Parana oriucn WILLIAM J. COURTNEY, OF NEW 5203K, N. Y.

"vanions-Trim.'

Specification of Letters ratent.

Patented Feb. 1.5. 1910.

Application filed November23, 1908. Serial No. 463,964.

tread that will tend to prevent the wheels of.

the automobile from skidding on slippery roads and having all the effects ofthe uses of a chain on a tread in gripping the road, but without any of the ob ect-1onable and undesir-able features of the use of'a chain.

It consists in the novel construction hereinafter described, pointed out in the appended claim and illustrated in the accompanying drawings.

Vhile the invention will be described as applied to the casing of apneumatic tire, yet it can also be applied to other cushion tires and to solid tires.

In the drawings, in whichsimilar reference characters designate corresponding parts, Figure l is a transverse sectional view of a pneumatic t-i re casing embodying the invention. Fig. tread.

The main part a of the tire casing is of the usual laminated rubber and fabric forma- 2- is a plan view of part of the tion.' On the periphery of the casing is the tread comprising the base b, also of laminated rubber and fabric, and the compara tively thick crown of rubber. The edges (Z of the tread are extended to cover the sides of the casing to protect the same and to aid in holding the tread in place. Interposed between the tread and the main part of the casing is the rubber diaphragm c. In the face of the crown of the tread, extending longitudinally and transversely through the same, are the grooves f intersectin each other. These grooves are of considerable depth and divide the crown into the rectangular spurs h. Passing through the spurs are the studs 2' having bases A: embedded in the diaphragm e and cylindrical heads Z embedded in the spurs. As the diameters of the bases is and the heads Z are much greater than the shanks of the studs, the latter will .be strongly held in place. The studs i are embedded in the canvas and rubber, flush with the surface of the tread. The. studs give rigidity to the spurs to increase the penetrative power of the latter and so that they will Withstand lateral strain. The bases 70 not only seri e to hold the studs in place, butbeing embedded in the rubber diaphragm 6 give a cushioning effect to the studs. The diaphragm backed by the body part a of the tire tends to force the studs outwardly, as they wear down, when the surrounding material ofthe tread is compressed by the load.

A wheel equipped with the tire of the foregoing description is particularly adapted to travel on slippery roads to prevent skidding. The exposed crown c engages the road material and the spurs h form a series of projections or-teeth that readily penetrate the loose soft outersurface of the (road and engage the hard stationary material beneath. The studs 2' not only give rigidity and penetrative power to the spurs, but. through the compressionof the material around them they project beyond the face of the crown and penetrate the loose soft su1= face of the road and grip the hard fixed material beneath.

Having thus described my invention, what I claim and desire to secure by Letters Patent is, l y

In a resilient tire, a main body part, a tread of elastic material secured to said body part comprising an integral base and a comparatively thick exposed crown, said crown having comparatively deep intersecting grooves to form spurs in its face, layers of fabric incorporated in the base of the tread.

a rubber diaphragm interposed between the body part and the tread, studs passing through said spurs and the laminated base of the'tread, enlarged heads on the outer ends of the studs embedded in said spurs, and enlarged bases on the inner ends of said studs interposed between said diaphragm and the inner face of the tread.

In testimony whereof I hereunto atlix my signature in the presence of two witnesses. \VILLIAM J. QOURTN EY. \Vitnesses:

JoHN G. PHEIL,

SETH BIRD. 

